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Gresham High School Weather Forecast
| TONIGHT | SATURDAY | SATURDAY NIGHT | SUNDAY | SUNDAY NIGHT | LABOR DAY | MONDAY NIGHT | TUESDAY | TUESDAY NIGHT | WEDNESDAY | WEDNESDAY NIGHT | THURSDAY |
 |  |  |  | | |  |  | |  |  |  |
| Chance of Showers | Chance of Showers | Mostly Cloudy | Chance of Showers | Chance of Showers | Chance of Showers | Partly Cloudy | Partly Sunny | Partly Cloudy | Mostly Sunny | Mostly Clear | Chance of Rain |
| Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 71°FHi: 22°C | Lo: 55°FLo: 13°C | Hi: 71°FHi: 22°C | Lo: 51°FLo: 11°C | Hi: 79°FHi: 26°C | Lo: 55°FLo: 13°C | Hi: 85°FHi: 29°C | Lo: 59°FLo: 15°C | Hi: 80°FHi: 27°C |
| POP: 20% | POP: 20% | POP: 20% | POP: 20% | POP: 20% | POP: 20% |
POP = Probability of Precipitation.
Weather Outlook Updated: 502 PM PDT Fri Sep 04 2026 
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Issued: 954 PM PDT Fri Sep 4 2026
Discussion
...Today through Thursday...This afternoon a vertically stacked low pressure system continues to churn right along the central Oregon coastline with showers and isolated thunderstorms progressing largely south to north across western Oregon and southwest Washington. As daytime heating peaks, the latest HREF indicates MUCAPE values top out around 300-600 j/kg however with effective shear values near 8-13 knots only weaker pulse-like thunderstorms are anticipated. The strongest convectio...